NASA-LLIS-0938 : Lessons Learned – Probable Scenario for Mars Polar Lander Mission Loss (1998)
سازمان: NASA - National Aeronautics and Space Administration (NASA)
کلید واژه: Flight Equipment , Hardware , Policy & Planning , Risk Management/Assessment , Safety & Mission Assurance , Software , Software Test , Spacecraft , System Integration and Test , Test & Verification , Test Article , Test Planning
سال: 2001
زبان: English
قیمت: 55000 تومان
Abstract:
Neither the MPL software requirements specification nor the software, subsystem or system test plans required verification of immunity to transient signals. MPL touchdown sensors generated known transient signals at leg deployment. Full leg deployment test was not repeated after wiring corrections. Tests should be re-run after test deficiencies are corrected or hardware or software is revised unless clear rationale exists for not doing so. Hardware operational characteristics, including transients and spurious signals must be reflected in software requirements and verified by test.